# Machine Learning Performance Engineer Source: https://realanalystjobs.com/job/machine-learning-performance-engineer-jane-street-651ed124 Machine Learning Performance Engineer at Jane Street, an on-site role based in London, UK. Posted on 20 May 2024, read from Jane Street's own careers page (Greenhouse), which RealAnalystJobs re-checks daily and removes the role when it closes. Jane Street is on the Home Office register of licensed visa sponsors. Updated 15 November 2026. ## Key facts - Company: [Jane Street](https://realanalystjobs.com/companies/jane-street) - Location: London, UK - Work mode: On-site - Posted: May 20, 2024 - Employment type: Full time - Source: Jane Street's careers page (Greenhouse), re-checked daily ## Visa sponsorship The posting does not say. Licensed UK sponsor. Licensed by the Home Office to sponsor Skilled Worker visas (register of 27 Oct 2026). A licence means the employer can sponsor; it does not mean every role will be sponsored. Listed as Jane Street Europe Limited (London). ## About this role We are looking for an engineer with experience in low-level systems programming and optimisation to join our growing ML team. Machine learning is a critical pillar of Jane Street's global business. Our ever-evolving trading environment serves as a unique, rapid-feedback platform for ML experimentation, allowing us to incorporate new ideas with relatively little friction. Your part here is optimising the performance of our models - both training and inference. We care about efficient large-scale training, low-latency inference in real-time systems and high-throughput inference in research. Part of this is improving straightforward CUDA, but the interesting part needs a whole-systems approach, including storage systems, networking and host- and GPU-level considerations. Zooming in, we also want to ensure our platform makes sense even at the lowest level - is all that throughput actually goodput? Does loading that vector from the L2 cache really take that long? If you’ve never thought about a career in finance, you’re in good company. Many of us were in the same position before working here. If you have a curious mind and a passion for solving interesting problems, we have a feeling you’ll fit right in. There’s no fixed set of skills, but here are some of the things we’re looking for: • An understanding of modern ML techniques and toolsets • The experience and systems knowledge required to debug a training run’s performance end to end • Low-level GPU knowledge of PTX, SASS, warps, cooperative groups, Tensor Cores and the memory hierarchy • Debugging and optimisation experience using tools like CUDA GDB, NSight Systems, NSight Computesight-systems and nsight-compute • Library knowledge of Triton, CUTLASS, CUB, Thrust, cuDNN and cuBLAS • Intuition about the latency and throughput characteristics of CUDA graph launch, tensor core arithmetic, warp-level synchronization and asynchronous memory loads • Background in Infiniband, RoCE, GPUDirect, PXN, rail optimisation and NVLink, and how to use these networking technologies to link up GPU clusters • An understanding of the collective algorithms supporting distributed GPU training in NCCL or MPI • An inventive approach and the willingness to ask hard questions about whether we're taking the right approaches and using the right tools • Fluency in English If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com . Description from Jane Street's public careers feed, reproduced so you can read the role here. Apply on the company's own site; Real Analyst Jobs never submits anything for you. ## How to apply Open [this role on Real Analyst Jobs](https://realanalystjobs.com/job/machine-learning-performance-engineer-jane-street-651ed124) and use Apply now there to reach the employer's application. The listing is re-checked against Jane Street's careers page daily and removed when it closes. ## Jane Street 2 open analyst roles on Real Analyst Jobs. [More roles at Jane Street](https://realanalystjobs.com/companies/jane-street) ## More like this ### Other open roles at Jane Street - [AML Onboarding Analyst](https://realanalystjobs.com/job/aml-onboarding-analyst-jane-street-c0bece94), London, UK (On-site) - [Compliance Analyst](https://realanalystjobs.com/job/compliance-analyst-jane-street-4891db4c), London, UK (On-site) - [Data analyst jobs in the UK](https://realanalystjobs.com/jobs/data-analyst-jobs-in-uk) - [Analyst job market report](https://realanalystjobs.com/analyst-job-market) - [What analyst roles pay](https://realanalystjobs.com/blog/data-analyst-salaries) ## Sources and links - [This role on Real Analyst Jobs](https://realanalystjobs.com/job/machine-learning-performance-engineer-jane-street-651ed124) - [Jane Street on Real Analyst Jobs](https://realanalystjobs.com/companies/jane-street) - [All analyst jobs](https://realanalystjobs.com/jobs)